Nike PreCool Vest

The vest is designed to cool the body's core temperature. Since 25% of our body's total energy goes into moving muscle and 75% into regulating heat, reducing an athlete's core temperature before the marathon or a field hockey match means more energy for the competition itself.

The Nike PreCool Vest is a key piece of equipment that can help provide the advantage an athlete needs. A grid of triangles is used in the construction of the vest, smaller on the shoulders and larger down the spine, to maximise skin contact. The closer the fit, the less ice needed to cool the body, and the lighter the vest will be. Each triangle is made of two layers to keep it cool. The inner one is filled with water, which is frozen, while the outer layer insulates like a thermos. Coated with aluminum, the triangles also reflect radiant heat working like the coating on mirrored sunglasses. That coating and insulated layer also mean less ice. Even more weight was reduced by making the PreCool Vest refillable. Instead of having to travel with a seven-pound vest pre-filled with liquid, the design team created sealed compartments that athletes can fill and freeze before competition. With core cooling, athletes can often last 21% longer, so try the Nike PreCool Vest for your next competition.